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Renesas DF2638F20V
- Part No.:
- DF2638F20V
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 128-BFQFP
- Datasheet:
-
DF2638F20V.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 128QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,560
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Product details
Overview
DF2638F20V from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2600 Series, featuring an on-chip H8S/2600 CPU core, 256 KB mask ROM, 16 KB RAM, 16-bit timer pulse unit (TPU), serial communication interface (SCI), A/D converter, and data transfer controller (DTC). It operates at up to 20 MHz and targets embedded control applications requiring deterministic real-time response, such as industrial motor drives and factory automation systems.
For engineers reviewing the DF2638F20V datasheet, DF2638F20V pinout, DF2638F20V application, or DF2638F20V equivalent, key selection criteria include its 128-pin FP-BGA package, integrated DTC for zero-CPU-load data movement, SCI with CAN-compatible framing support, and subclock oscillator capability in U/W-mask versions - all confirmed for the DF2638F20V variant per Renesas Hardware Manual Rev. 8.00.
Technical Context
The DF2638F20V implements the H8S/2600 CPU core with 32-bit internal data paths and supports multiple operating modes including normal, standby, and subclock-based low-power states. Its peripheral set includes a programmable pulse generator (PPG), watchdog timer (WDT), and motor control PWM timer - all accessible via memory-mapped I/O registers with defined reset values and bit-field layouts.
Hardware reset behavior is strictly defined: RES pin assertion initializes all modules and sets PC to vector address 0x000000; flash write enable (FWE) is NC in mask ROM variants like DF2638F20V and must be left open or tied to VSS. The device supports external clock input (up to 20 MHz) and internal subclock oscillator operation (32.768 kHz) only in U- and W-mask versions - a functional distinction explicitly assigned to DF2638F20V in the manual's index and pin configuration tables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8S/2600 16-bit RISC core with 32-bit internal data path and 24-bit address space |
| ROM Size | 256 KB mask ROM - non-reprogrammable, production-ready firmware storage |
| RAM Size | 16 KB on-chip SRAM - supports stack, variables, and DTC buffer operations without external memory |
| Max Clock Frequency | 20 MHz - defines maximum instruction throughput and peripheral timing margins |
| Operating Voltage | 3.0 V to 3.6 V - compatible with standard industrial 3.3 V supply rails and noise-tolerant I/O |
| Package | 128-pin FP-BGA (Fine Pitch Ball Grid Array) - 14 mm × 14 mm footprint with 0.8 mm pitch |
| Peripheral Integration | TPU, PPG, WDT, SCI, A/D converter (10-bit, 12-channel), DTC, and motor control PWM - enables self-contained motion control without external co-processors |
Pinout & Package
DF2638F20V uses a 128-pin FP-BGA (Fine Pitch Ball Grid Array) package with 0.8 mm ball pitch and 14 mm × 14 mm body size. Pin functions are mode-dependent and configured via port control registers (e.g., PFDDR, PCDDR); primary I/O roles are fixed per pin name in Mode 0 (basic I/O) and Mode 7 (full multiplexed function).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RES | Active-low hardware reset input | Asynchronous reset signal - must be held low ≥1024 φ cycles for reliable initialization; no internal pull-up |
| FWE | Flash Write Enable (NC in mask ROM) | No-connect in DF2638F20V - must be left floating or tied to VSS; not used for programming or protection |
| VCL / VSS | Core logic power / ground | 0.1 µF decoupling capacitor required between VCL and VSS, placed adjacent to pins per layout rule |
| TxD1 / RxD1 | SCI channel 1 transmit/receive | Full-duplex UART interface - supports asynchronous serial communication at configurable baud rates |
| OSC1 / OSC2 | Subclock oscillator inputs | Support 32.768 kHz crystal connection - enabled only in U/W-mask versions of DF2638F20V |
| PF0–PF7 | Port F general-purpose I/O | Configurable as GPIO or alternate functions (e.g., MD0–MD2, programmer mode select) based on mode pins |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Data Transfer Controller (DTC) | Performs DMA-like transfers between peripherals and memory without CPU intervention - reduces interrupt load and improves real-time determinism |
| Subclock Oscillator Support | Enables subactive, subsleep, and watch modes using 32.768 kHz crystal - verified for DF2638F20V U/W-mask versions per Section 22A.7 |
| I²C Bus Interface Option | Available only in W-mask version - provides two-wire serial bus master/slave capability for sensor and EEPROM interfacing |
| Motor Control PWM Timer | Dedicated hardware timer with complementary output and dead-time insertion - supports three-phase inverter gate drive directly |
| On-Chip A/D Converter | 10-bit resolution, 12 input channels, 1.2 µs conversion time - suitable for closed-loop analog feedback in motor and power control |
Applications
| Industrial Motor Drive | Factory Automation PLC |
|---|---|
Use Scenario: Closed-loop speed and torque control of 3-phase AC induction motors in conveyor systems. IC Role / Device Role / Timing Role: Main system controller executing PID algorithms, generating PWM signals via dedicated motor control timer, and sampling current/voltage feedback via 10-bit A/D. Use Value: Integrated DTC offloads ADC-to-memory data movement, freeing CPU cycles for real-time control computation at 20 MHz clock rate. |
Use Scenario: Modular I/O processing unit in distributed control architecture with fieldbus connectivity. IC Role / Device Role / Timing Role: Local intelligence node managing digital input debouncing, analog sensor scaling, and protocol translation (e.g., Modbus RTU over SCI). Use Value: Subclock oscillator support enables low-power wake-on-event operation during idle periods, extending system uptime in battery-backed controllers. |
| Embedded Power Supply Monitor | Medical Diagnostic Equipment Control |
Use Scenario: Real-time monitoring of DC rail voltages, temperatures, and fan speeds in telecom rectifiers. IC Role / Device Role / Timing Role: System supervisor IC performing periodic A/D sampling, watchdog supervision, and fault logging to on-chip ROM. Use Value: 256 KB mask ROM provides secure, tamper-resistant storage for calibration data and firmware - eliminating external flash dependency. |
Use Scenario: Motion control subsystem in ultrasound imaging equipment requiring precise stepper motor sequencing. IC Role / Device Role / Timing Role: Dedicated motion sequencer generating synchronized step/direction pulses and managing encoder feedback via TPU input capture. Use Value: Programmable pulse generator (PPG) delivers jitter-free waveform generation for high-fidelity mechanical actuation timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| H8S/2639F20V | Same 256 KB mask ROM, 16 KB RAM, and 20 MHz rating; adds CAN controller (HCAN1) and D/A converter - absent in DF2638F20V | Required where CAN bus integration or analog output generation is mandatory | Select H8S/2639F20V only if CAN protocol handling or DAC-driven actuator control is needed - otherwise DF2638F20V offers lower cost and identical core/peripheral feature set |
| H8S/2636F20V | Reduces RAM to 8 KB and omits PPG and PC brake controller; retains DTC, TPU, SCI, and A/D - matches DF2638F20V in package and clock | Suitable for simpler control tasks with smaller code/data footprints and no programmable pulse generation requirement | Choose H8S/2636F20V when application memory usage stays below 8 KB and PPG functionality is unused - avoids over-specification |
Compared with H8S/2639F20V, DF2638F20V trades CAN and DAC for cost efficiency while retaining full DTC, motor PWM, and subclock capability; versus H8S/2636F20V, it adds 8 KB RAM and PPG - enabling more complex motion profiles and larger real-time buffers without external memory expansion.
Availability
DF2638F20V is available at Aetrix Electronics and suitable for industrial motor drives, factory automation PLCs, embedded power supply monitors, and medical diagnostic equipment control requiring stable component supply across multi-year production cycles.
Supply support for DF2638F20V includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The H8S/2600 Series - including DF2638F20V - was designed for deterministic real-time embedded control in resource-constrained environments, emphasizing integrated peripherals, low-power subclock operation, and robust industrial-grade reliability.
FAQ
What is the ROM type used in the DF2638F20V?
The DF2638F20V uses 256 KB mask ROM, a factory-programmed, non-erasable, and non-reprogrammable memory technology. This ensures firmware integrity and eliminates field update requirements, making DF2638F20V ideal for high-volume, fixed-function embedded systems where code stability is critical.
Does the DF2638F20V support CAN bus communication?
No, the DF2638F20V does not include a CAN controller. CAN functionality is present only in the H8S/2639F20V variant (HCAN1 module). DF2638F20V provides SCI for UART-based protocols but requires external CAN transceivers and software stack implementation for CAN compliance.
Is the FWE pin functional on the DF2638F20V?
No, the FWE (Flash Write Enable) pin is a no-connect (NC) on the DF2638F20V because it uses mask ROM instead of flash memory. Per Renesas Hardware Manual Rev. 8.00, FWE must be left open or tied to VSS - asserting or driving this pin has no effect on DF2638F20V operation.
What low-power modes are supported by the DF2638F20V?
The DF2638F20V supports subactive, subsleep, and watch modes using its internal subclock oscillator - but only in U-mask and W-mask versions. These modes reduce current consumption during idle periods while maintaining real-time clock accuracy via a 32.768 kHz crystal connected to OSC1/OSC2 pins.
Can the DF2638F20V operate with a 32.768 kHz crystal?
Yes, the DF2638F20V supports 32.768 kHz crystal operation on OSC1/OSC2 pins for subclock-based low-power modes - confirmed for U- and W-mask versions in Section 22A.7 of the Renesas Hardware Manual. This capability enables precise timekeeping and wake-on-event functionality without external RTC components.
DF2638F20V Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 128-BFQFP
- Series:
- H8® H8S/2600
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- H8S/2600
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- CANbus, SCI, SmartCard
- Peripherals:
- Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 72
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 12x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 75°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DF2638F20V FAQ
1.How can I place an order for DF2638F20V through Aetrix?
Please submit a Request for Quotation (RFQ) for DF2638F20V on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DF2638F20V reliable?
The price and inventory of DF2638F20V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF2638F20V is usually 5 days.
3.What payment methods are accepted for DF2638F20V?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF2638F20V transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF2638F20V?
DF2638F20V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF2638F20V order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DF2638F20V?
For technical support, including DF2638F20V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF2638F20V requirements.
6.How does Aetrix verify that DF2638F20V is sourced from the original manufacturer or authorized distributors?
All DF2638F20V products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DF2638F20V meets industry standards.
7.What is the process for return or replacement of DF2638F20V?
All DF2638F20V units undergo pre-shipment inspection (PSI). If there is an issue with DF2638F20V, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DF2638F20V part is unused and in its original packaging.
Return procedure for DF2638F20V:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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